{"product_id":"b5-sierra-k-stock-flat-dark-earth","title":"B5 Systems SIERRA K Stock – AR-15\/M16 Carbine","description":"\u003cp\u003eThe B5 Systems SIERRA K Stock delivers a streamlined profile with enhanced cheek weld and shoulder contact for faster target acquisition on AR-platform carbines. Its contoured design reduces bulk while maintaining structural rigidity, making it ideal for close-quarters work and dynamic shooting positions.\u003c\/p\u003e\u003cp\u003eConstructed from reinforced polymer with a Flat Dark Earth finish, this mil-spec carbine stock installs on any standard AR-15 or M16 buffer tube. Features include an integral QD sling swivel socket, anti-rattle locking system for wobble-free fit, and textured buttpad for secure shouldering. No permanent modification required.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Fixed-position carbine stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, M16, carbine-length buffer tube (mil-spec)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Reinforced polymer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Flat Dark Earth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable:\u003c\/strong\u003e No (fixed position)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in replacement for mil-spec buffer tube, no gunsmithing required\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"B5 Systems","offers":[{"title":"Default Title","offer_id":47936547782911,"sku":"B5SRK-1656","price":57.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/5526582.jpg?v=1766482964","url":"https:\/\/doublestackstore.com\/products\/b5-sierra-k-stock-flat-dark-earth","provider":"Double Stack Store","version":"1.0","type":"link"}